Thyracont VD8 Series, Operating Instructions Manual

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For data storage a battery-independent memory-IC is used whereas the stored
extremal values are lost when the battery is exchanged.
Data logging is stopped if no further memory is available, when the vacuum
meter is switched-off or when it is connected to a PC via USB (see chapter 4.3).
In the Data Logger Mode the VD81 keeps operating continuously until it is
switched-off manually or, after the maximum operation time has elapsed, auto-
matically (see chapter 5.4).
Switch-off the vacuum meter:
Press Mode-Key twice: return to 1) Auto-Off Mode.
4.3 PC Mode
For data transmission the VD81 can be connected to a PC via USB interface.
The VacuGraph
™ Windows™ Software (accessory) supports online recording of
measurements as well as the read-out of the VD81 data memory. Measurements
are plotted as a diagram an can be exported as text file for further analysis.
The separately saved values of minimum and maximum pressure cannot be
transmitted to the PC.
Further you can perform any parameter settings such as logging rate or display
unit or easily by means of the VacuGraph
™ software.
The VD81 is switched into PC Mode as soon as a cable connection with a free
PC USB port is established:
The VD81 is now ready for bidirectional data transmission. The communication is
performed according to the Thyracont protocol, detailed information is available
in a separate description.
When the VD81 is switched into PC Mode, actual pressure dis-
play as well as any data logging is stopped!
After the USB cable is disconnected the VD81 switches into Auto-Off Mode.
MODE
MODE